code: def contractions(cls):
      return _wrap_apply_to_each(Perturb.contractions, both=True)
  
imports: from typing import Optional, Tuple, Iterable, Callable, Union
  import itertools
  import numpy
  from checklist.test_suite import TestSuite
  from checklist.test_types import MFT, INV, DIR, Expect
  from checklist.perturb import Perturb
  from allennlp.confidence_checks.task_checklists.task_suite import TaskSuite
  from allennlp.confidence_checks.task_checklists import utils
  from allennlp.predictors import Predictor
label_desc: Use image node_id 4 for calling the TextualEntailmentSuite obj's underlying member method code with example usage: obj.contractions(cls) and returns: _wrap_apply_to_each